Results 81 to 90 of about 1,518,477 (199)

Generating solutions via sigma-models

, 2008
We review recent development of solution-generating techniques for four and five-dimensional Einstein equations coupled to vector and scalar fields. This includes D=4 Einstein-Maxwell-dilaton-axion theory with multiple vector fields, D=5 Einstein-Maxwell
Gal'tsov, Dmitri V.
core   +1 more source

Lattice Sigma Models with Exact Supersymmetry [PDF]

, 2004
We show how to construct lattice sigma models in one, two and four dimensions which exhibit an exact fermionic symmetry. These models are discretized and {\it twisted} versions of conventional supersymmetric sigma models with N=2 supersymmetry.
A.G. Cohen, A.G. Cohen, D.B. Kaplan, E. Witten, E. Witten, F. Sugino, G.G. Batrouni ., J. Bartels, J. Giedt, J. Nishimura, J.M. Maldecena, J.M.F. Labastida, L. Alvarez-Gaume, L. Alvarez-Gaume, L. Baulieu, S. Catterall, S. Catterall, S. Weinberg, S.A. Gottlieb, Simon Catterall, Sofiane Ghadab   +20 more
core   +3 more sources

Integrability in sigma-models [PDF]

, 2019
Abstract The following topics are covered in this chapter: (1) Homogeneous spaces, (2) Classical integrability of sigma-models in two dimensions, (3) Topological terms, (4) Background-field method and beta-function, (5) S-matrix bootstrap in the O(N) model, (6) Supersymmetric coset models and strings on AdS(d) x X.
openaire   +2 more sources

Quantum distillation of Hilbert spaces, semi-classics and anomaly matching

Journal of High Energy Physics, 2018
A symmetry-twisted boundary condition of the path integral provides a suitable framework for the semi-classical analysis of nonperturbative quantum field theories (QFTs), and we reinterpret it from the viewpoint of the Hilbert space. An appropriate twist
Gerald V. Dunne, Yuya Tanizaki, Mithat Ünsal   +2 more
doaj   +1 more source

Unravelling an Extra Neutral Gauge Boson at the LHC using Third Generation Fermions

, 2011
We study the potential to use measurements of extra neutral gauge bosons (Z') properties in pp collisions at the Large Hadron Collider to unravel the underlying physics.
Diener, Ross, Godfrey, Stephen, Martin, Travis A. W.   +2 more
core   +1 more source

Phantom Black Holes and Sigma Models

, 2011
We construct static multicenter solutions of phantom Einstein-Maxwell-dilaton theory from null geodesics of the target space, leading to regular black holes without spatial symmetry for certain discrete values of the dilaton coupling constant.
A. Papapetrou, G. Clément, Gérard Clément, H. Stephani, Júlio C. Fabris, K. Bronnikov, K. A. Bronnikov, Manuel E. Rodrigues, Mustapha Azreg-Aïnou, R. Gilmore   +9 more
core   +3 more sources

Nicolai maps for supersymmetric sigma models

Journal of High Energy Physics
Supersymmetric field theories can be characterized by their Nicolai map, which is a nonlinear and nonlocal field transformation to their free-field limit.
Olaf Lechtenfeld
doaj   +1 more source

Local β-deformations and Yang-Baxter sigma model

Journal of High Energy Physics, 2018
Homogeneous Yang-Baxter (YB) deformation of AdS5 × S5 superstring is revisited. We calculate the YB sigma model action up to quadratic order in fermions and show that homogeneous YB deformations are equivalent to β-deformations of the AdS5 ×S5 background
Jun-ichi Sakamoto, Yuho Sakatani
doaj   +1 more source

Finite sigma models and exact string solutions with Minkowski signature metric

, 1992
We consider $2d$ sigma models with a $D=2+N$ - dimensional Minkowski signature target space metric having a covariantly constant null Killing vector. These models are UV finite. The $2+N$-dimensional target space metric can be explicitly determined for a
A. A. Tseytlin, A. A. Tseytlin, A. A. Tseytlin, A. A. Tseytlin, A. A. Tseytlin, A. A. Tseytlin, A. A. Tseytlin, A. A. Tseytlin, A. A. Tseytlin, A. A. Tseytlin, A. A. Tseytlin, A. A. Tseytlin, A. Cooper, A. H. Chamseddine, A. H. Chamseddine, A. Morozov, A. Sen, A. Strominger, B. de Wit, B. Zumino, C. Callan, C. Callan, C. Duval, C. G. Callan, C. G. Callan, C. Teitelboim, D. Amati, D. Amati, D. Friedan, D. Friedan, D. Garfinkle, E. Witten, E. Witten, E. Witten, F. David, G. Curci, G. Horowitz, G. Horowitz, G. Horowitz, G. Mandal, G. Veneziano, H. W. Brinkmann, I. Antoniadis, I. Bars, I. Bars, I. Bars, I. Bars, I. Jack, J. Distler, J. Gracey, J. H. Horne, J. Polchinski, J. Russo, J. Russo, K. A. Meissner, K. A. Meissner, L. Alvarez-Gaumé, L. Alvarez-Gaumé, L. Alvarez-Gaumé, M. C. Prati, M. Crescimanno, M. D. Freeman, M. Gasperini, M. Mueller, M. T. Grisaru, M. T. Grisaru, M. T. Grisaru, P. Di Vecchia, P. E. Haagensen, P. Ginsparg, Q-Han Park, R. Dijkgraaf, R. E. Rudd, R. Guven, R. Jackiw, R. Myers, S. B. Giddings, S. Cecotti, S. Das, S. Elitzur, S. F. Hassan, S. P. de Alwis, S. R. Das, T. Banks, T. Banks, T. T. Burwick, V. Novikov, V. Novikov   +87 more
core   +1 more source

Topological defects in K3 sigma models

Journal of High Energy Physics
We consider the topological defect lines commuting with the spectral flow and the N $$ \mathcal{N} $$ = (4, 4) superconformal symmetry in two dimensional non-linear sigma models on K3.
Roberta Angius, Stefano Giaccari, Roberto Volpato   +2 more
doaj   +1 more source